Devtools: PM4 Explorer (#1094)

* Devtools: Pause system

* Devtools: pm4 viewer

- new menu bar
- refactored video_info layer
- dump & inspect pm4 packets
- removed dumpPM4 config
- renamed System to DebugState
- add docking space
- simple video info constrained to window size

* Devtools: pm4 viewer - add combo to select the queue

* Devtools: pm4 viewer - add hex editor

* Devtools: pm4 viewer - dump current cmd

* add monospaced font to devtools

* Devtools: pm4 viewer - use spec op name

avoid some allocations

src/core/libraries/videoout/driver.cpp

@@ -8,6 +8,7 @@
 #include "common/config.h"
 #include "common/debug.h"
 #include "common/thread.h"
+#include "core/debug_state.h"
 #include "core/libraries/error_codes.h"
 #include "core/libraries/kernel/time_management.h"
 #include "core/libraries/videoout/driver.h"
@@ -284,7 +285,7 @@ void VideoOutDriver::PresentThread(std::stop_token token) {
         if (vblank_status.count % (main_port.flip_rate + 1) == 0) {
             const auto request = receive_request();
             if (!request) {
-                if (!main_port.is_open) {
+                if (!main_port.is_open || DebugState.IsGuestThreadsPaused()) {
                     DrawBlankFrame();
                 }
             } else {